Okay, As for the good Professor. Just what kind of scientist is this? If he's studying mountains, he's likely to be a geologist, right? So why would he be qualified to perform an autopsy on the Andean woman, the autopsy that he didn't get a chance to perform?

Saw it via MST3K, actually one of the movies that still has some decent stuff in it.

Also, it wasn't the falling guy calling out NO!, it's the friend trying to pull him up that couldn't see him. He yells NO! when the other guy sees the one that fell has no head and lets go forcing him to let go or be pulled down too.